Add some more tests to specialize branched loops.
Add some more tests to specialize branched loops.

jiawen/Halide,mcanthony/Halide,ayanazmat/Halide,dougkwan/Halide,mcanthony/Halide,kenkuang1213/Halide,kenkuang1213/Halide,ronen/Halide,dan-tull/Halide,lglucin/Halide,rodrigob/Halide,tdenniston/Halide,fengzhyuan/Halide,psuriana/Halide,fengzhyuan/Halide,ayanazmat/Halide,smxlong/Halide,rodrigob/Halide,ronen/Halide,dan-tull/Halide,ayanazmat/Halide,kenkuang1213/Halide,myrtleTree33/Halide,kgnk/Halide,dougkwan/Halide,kenkuang1213/Halide,aam/Halide,aam/Halide,kgnk/Halide,gchauras/Halide,fengzhyuan/Halide,jiawen/Halide,ronen/Halide,lglucin/Halide,dougkwan/Halide,ayanazmat/Halide,adasworks/Halide,tdenniston/Halide,damienfir/Halide,fengzhyuan/Halide,kgnk/Halide,smxlong/Halide,ayanazmat/Halide,ronen/Halide,kgnk/Halide,delcypher/Halide,tdenniston/Halide,adasworks/Halide,delcypher/Halide,smxlong/Halide,tdenniston/Halide,myrtleTree33/Halide,gchauras/Halide,damienfir/Halide,tdenniston/Halide,lglucin/Halide,myrtleTree33/Halide,damienfir/Halide,tdenniston/Halide,myrtleTree33/Halide,smxlong/Halide,dougkwan/Halide,smxlong/Halide,delcypher/Halide,rodrigob/Halide,dougkwan/Halide,myrtleTree33/Halide,jiawen/Halide,dan-tull/Halide,kenkuang1213/Halide,fengzhyuan/Halide,myrtleTree33/Halide,gchauras/Halide,psuriana/Halide,aam/Halide,ayanazmat/Halide,tdenniston/Halide,psuriana/Halide,aam/Halide,smxlong/Halide,lglucin/Halide,adasworks/Halide,aam/Halide,delcypher/Halide,ayanazmat/Halide,rodrigob/Halide,rodrigob/Halide,smxlong/Halide,psuriana/Halide,adasworks/Halide,dougkwan/Halide,smxlong/Halide,aam/Halide,lglucin/Halide,delcypher/Halide,psuriana/Halide,rodrigob/Halide,ronen/Halide,mcanthony/Halide,kenkuang1213/Halide,dan-tull/Halide,aam/Halide,fengzhyuan/Halide,gchauras/Halide,myrtleTree33/Halide,delcypher/Halide,mcanthony/Halide,kenkuang1213/Halide,damienfir/Halide,damienfir/Halide,jiawen/Halide,dan-tull/Halide,myrtleTree33/Halide,rodrigob/Halide,mcanthony/Halide,adasworks/Halide,adasworks/Halide,damienfir/Halide,kgnk/Halide,damienfir/Halide,tdenniston/Halide,fengzhyuan/Halide,kgnk/Halide,lglucin/Halide,ronen/Halide,dan-tull/Halide,kgnk/Halide,lglucin/Halide,dougkwan/Halide,adasworks/Halide,jiawen/Halide,jiawen/Halide,damienfir/Halide,mcanthony/Halide,gchauras/Halide,ayanazmat/Halide,psuriana/Halide,fengzhyuan/Halide,gchauras/Halide,jiawen/Halide,psuriana/Halide,rodrigob/Halide,ronen/Halide,mcanthony/Halide,delcypher/Halide,ronen/Halide,adasworks/Halide,delcypher/Halide,dan-tull/Halide,dan-tull/Halide,kgnk/Halide,kenkuang1213/Halide,dougkwan/Halide,mcanthony/Halide